Stellar Xpress got started as an attempt to convert SkyRoads into a
3D game. After developing it for about half a year, we managed to
sell it to a VR gear manufacturer as a demo to be bundled with
their hardware, and the original plans for SkyRoads conversion were
abandoned as the original SkyRoads gameplay could not be reproduced
in real 6 DOF 3D.

Note the nice lighting effects that were implemented by reprogramming
the VGA palette. However, we do not recommend running it in DOS box
under Windows  because of hardware virtualization the constant
palette reprogramming is slow as hell.